Edge labeling mechanism



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EDGE LABELING MECHANISM Filed March 23, 1931 2 Sheets-Sheet l INVENTOR94 FF'OED E. \VEE:

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EDGE LABELING MECHANISM Filed March 23, 1931 2 Sheets-Sheet 2 ATTRNEY'l'ATES PATENT Eta Gypsum Company, Chicago, ill, a r 1 poration oiIllinois Application March 23, 1931, Serial No. %,543

5 label to the edge oi moving strips of material, such as gypsum board.

In the manufacture of composition board, such 88 gypsum plaster and wallboards, it is custo form the board by depositing a plastic cumpositioncomposed mainly of calcllned gypsum and water, between the upper andlower cover sheets of the board to be formed, and then i'olding theedges of the paper cover sheet about the plastic material to completelyenclose the latter with paper. The board is allowed to set while it ismoved continuously, is then cut into lengths and passed through a highlyheated drying kiln which serves to completely dry the board ready forshipment. The temperature oi the drying hiln is usually so high thatthere is a tendency to recalcine the gypsum in the edges of the board,thm melting the edges rather weak and having a poor bond with the paper.

I desire to apply a narrow label in the form of a continuous strip tothe edge of the composition board. This label carries sales indicia.such as trade marks, patent numbers, etc. It is important that the labelbe exactly positioned on the edge oi thebcurd so that it will not extendbeyond either face of the board. It is also essential that the strip befirmly attached to the board by suitable Mi: ie the boards are usuallyonly to in thickness,1 have found that the addition of the strip'labelserves materially to retain the moisture in the edge of the board andpreventrecalclnation of the core material. in applying the strip label,it is desirable that a continuous supply of the label strip bemaintained so, that unlabeled board will not be produced. v

An object oi invention, therefore, is to provide an appears for applyinga continuous strip of labeling mate to the edge of composition boardswhich are manufactured in continuous strips.

Another object of this invention is to provide an aptm oi the classdescribed which will position the labs strip accurately on the edge ofthe board and will also insure a continuous supply of the stripmaterial.

A further object 01 the invention is to provide a method of retainingmoisture in the edges of thebcard while the board is passing through thedryh s so as topieventrecalclnation oi the core matl in the board; alsotoimprove the plaster. boardsand strip labeling apparatus in other retshereiter specified and claimed.

ierence is to be had to the accompanying drasis forming a of thisspecification, in W Fig. 1 is a plan view of a plaster board machinewith my improved edge lube apparatus in place,

Fig. 2 is a side elevation oi the apparatus is in Fig.1,

Fig. 3 is a. sectional elevation through the apparatus taken on line 3-3of Fig. 1,

Fig. 4 is a sectional elevation through the apparatus taken on the linel-4 of Fig. i,

Fig. 5 is a sectional view through the signalling apparatus taken online 5-8 c! Fig. 3,

Fig. 6 is a sectional elevation through the wetting pad taken on line6-4 of Fig. 2.

Fig. 7 isa view similar to Fig. 4 but showing a modified form oiapparatus for making a narrow width board, and

Fig. 8 is a fragmentary perspective view of a portion oi a pressingshoe.

Plaster board or other composition board to .which the edge label is tobe applied, is usually composed mainly of a core w of gypsum or othersuitable cementltlous material, said core having an upper cover sheet iion its uppersuriace,

and a. lower cover sheet ii on its lower surface. The lower cover sheetI2 is preferably provided with an upward fold l3 and an inwardly turnedtold II on each edge, the mm H preferably under? lying the outer edge oithe cover sheet H and being adhesively attached thereto. The outer edgeor the cover sheet it may be chamiered or provided with a feathered edgei1 desired to make a smooth face board. After introducing the plus-- ticcore material l9 between the cover sheets II and II, the former plasterboard strip is allowed to pass a considerable distance to give time forthe plaster or Paris to set in solid form. During this setting period,the plaster board is carried by a belt it supported upon idler rollers,i6. the latter being mounted upon shatts ll which are rotatablysupported in bearings ll on framework it.

After the continuous strip of plaster board has set to solid form, andbefore it is cut into suitable lengths and passed through the dryer. theedge label 20 is applied to the edge of the plaster board on top of thefold ll. This edge label is usually or in width and is supplied in theform'ot a roll it of comparatively Large diameter. The inside oi thetape is ed so that only wetting of the summed surface of the tape isrequired before pressing it into contact with the fold l3. Roll 2! ispreferably supported at its center on a hub 22 which has a. restricted,threaded section 23, the latter passing through a sheet of insulatingmaterial 24, such as laminated, phenolic condensation products. Thesection 23 also passes through the center of a disc of insulatingmaterial 25 and is provided with a nut 26 screwed on the threadedsection so as to seon f.

1% are mounted to rotate with the section it, the rotation caused by thetops it being continuously unwound from the roll ii, a. friction contactexisting between said roll 28 and disc 24.

A 3201i; 2S ,0- (SO-X1811? through the hub 22? and is provided with atiiresdeol section 29 of reduced diameter, which passes through a discof insulating material so, being secured thereto by e not ti. The outeredge oi the disc 36 is preferably secured by screws 32 to s metal platethe .w': being so proportioned that an apprecinbie clearance between thedisc is and plate $3 is maintained at all times to avoid frictioncontact therebetwcen. The plate 33 is preferably inclined at en to tothe horizontal as seen in Fig. 3, beins\supported by a bracket 8E5connected to said plate by suitable bolts Sill. The bracket 35 issecured to main longitudinal channels 3? of the board machine by moonsof bolts 38. The plate 33 is preferably oblong in shnpe so that two ofthe discs 26 and rolls 2i may be mounted upon each plate. when one rollis exhsusted, the second roll may be ately connected in to supply thetape to the edge of the plaster board while the first roll is beingreplaced.

After the tape or label strip it leaves the roll til, it around thesmall idler pulley 4B which is rotatably supported upon the plate 33.The tape'must now be wet on its cued surieceto render said surfacesticky, and for this purpose I provide a wetting pad ll of felt or othersuitable fibrous material. said pad being retained in a rectangularshallow box 2. having a loose fitting cover it. The box 32 is preferablyin the form of an angle having the horizontal legs it thereof secured tothe plate lit by means of bolts 35. The lower wall oi the box t? hassent out portion All which serves to permit the summed surface of thetape 'to contact directly with the fibrous material 5! and also permitsany excess wetcr to drain away. The water for mo stening the fibrousmaterial ii is supplied through a pipe so screwed into the bottom ofplate so, said pipe being connected to a liquid measuring device so ofstandard design, saiddevice preferably being of the type coonly used asoilers for machinery.

' m measuring device mey consist of s. glass cylinder so retainedbetween caps bl, s central tube 52 having s. lower orifice es, passingdownwcrdly through the upper cap 55. An adiusting head so connected tothe upper end 0! the tube 52 outside the cap bl is knurled to permitmanual rotetion oi the tube 52 so us to rote the amount oi water flowingout of the orifice W. A lever to is also associated with the upper endor the tube or for opening or completely shutting theortfice so ifdesired to stop the flow of water. A sight glass 51 is provided in thepipe as below the bottom cap 8i so that an observer can see the rate offlow or dropping of the water from the measuring device. A water supplypipe 66 is also connected to the bottom cop M, being provided with afilter 82 carried by a suitable supporting bracket, and also beingprovided with s. shut-off valve 62 and a drain cock to. In this wsy ameasured quantity of water is supplied to the fibrous pad ll at auniform rate of fiow. It should be \mderstcod that my apparatus may bespoiled to both edges of the plaster board in which pose a branch supplypipe fib'will also pass underon its surmosses face, it passes inwardlytoward the edge of the board and is firmly pressed thereon by means of ashoe '8. This shoe Si is provided with a plate l'l lying above theplaster board edge and is also provided with a, U-sheped plate 67aconnected by bolts 68 to a horizontally extendins bar ll so so toslidably support said shoe on said bar. Where the tape as first contactswith said shoe, the latter is provided with a rounded shoulder "a, (Fig.8) and flanges 68b on each edge of said shoe which serve to define thepath 0! the tape so as to accurately position the tape midway o! theedge of the board. A washer I0 serves to confine a. spring 12 betweensaid washer and the plate 81a. The washer it! bears against a bracket I4welded to the rod 69, said bracket being pivotally supported on I apivot bolt' I6 secured to vertical standards ll secured to the mainchannel 81 of the plaster board machine. A stop bolt 18 is secured toeach standard 11 so as to engage the outer end 0! rod 69 and limit thecounter-clockwise movement of said rod when the shoe 88 is lifted awayfrom the edge of the board for cleaning, etc. After the tape passesbeyond the shoe 66 a brush so contacts with said tape so as to aid infirmly and adhesively attaching the tape to the edge of the plasterboard. A second shoe pressing device may be provided beyond the brushBil is desired so as to further insure a firm application of the tape tothe edge of the plaster board.

After the tape has been applied to the plaster boardedge, the plasterboard passes forwardly to e. cutting knife 0! standard design which isadapted to cut the some to desired lengths. These lengths of plasterboard then pass through a drying kiln having highly heated air moving ata high velocity to dry the moisture out of the plaster board. Owing tothe temperature of the kiln, it has been previously found that thegypsum core material in the edges of the board tends to recalcine, thusmaking the edges weak and destroying the bond between the paper and thecore. However, I have found that when the tape is applied to the edge ofthe plaster board, it serves to retain the moisture in the board coreand prevent recalcination, producing boards of superior quality havingottractive edges bearing the trade mark and other indicia which I desireo a ply.

In order that the board machine operator may see from a distance when aroll is exhausted. I preferably provide a signalling device in the formof e. standard electric lamp 8| which is in circuit dflwith a source orelectric current. The ends of the circuit 82 are connected to terminalposts t9 and as which are preferably oi metal and are provided with wireconnecting screws 85 in their outer ends. These terminal posts 88 and 84are preferably hollow to receive annular brushes ll which bear againstcontsctsegments 81 and I! which are mounted on the insulation disc 25.The brushes '0 are resiliently urged into contact with the segments 81and 88 by means 0! coll, compression springs 89 contained within theterminal posts N. As seen in Fig. 5. the segment 81 is greater than 180degrees and the segment 88 is less than 180 degrees, so that when thebrushes are in the position shown in Fig. 5, the circuit is closed andthe lamp 8! is lighted. Insulation pacers 90 are interposed between theends of the cements l1 and ll so that when one of the brushes 86contacts with the segment 88 andthe other brush contacts with thesegment 81, the circuit is broken and the lamp Bl coca out. It

' light flashes slowly, and vice verse.

When e nerrow plester board is to be monuiactureds spacer sleeve 932(Fig. 7) is positioned on the rod. till oeuween'the spring l2 end platetile so as to maintain sulcstentiollythe some pressure of the shoeogoinst the label strip to. i

in operation the rolls or paper M are placed with their center co-exielwith the hub 22 and with the foce of the roll resting upon the rotarydisc M. The paper strip til unwinds sind passes with its summed surfacein contact with the fibrous pod ti which is supplied with water from themeasuring device The moistened paper then passes under the shoe litwhich is pressed inwardly by spring it to cause the moistened surfece topress firmly against the edge of the plaster board. A brush til thensids in securing adhesion between the tape and the plaster board and onsecond shoe tit presses eeeinst the tape to complete the adhesionthereoi..- As long as the roll is not exhausted ond'lreeps rotetine, thelump or continues to flush intermittently due to the action of thebrushes so on the contact segments d! and lit. When the roll isexhausted, the lump ea eitherstovs lit or goes out, indicating to theoperator that the second roll of paper carried by the plate 323 shouldhe applied to the edge oi the plaster board.

if desired, uneummed strips of paper may he used and the adhesive liquidapplied by means of the fibrous pod ill. The label many also he eppliedto the looerds after diving, if desired. When the hoards are stocked inface to nice position, the label strips sppeer on the edges of the boardand give the product on ottrsictiveuppesroncc.

I would state in conclusion that while the illustrated exampleconstitutes s proctlcel em bodiment of my invention, i do not wish tolimit myself precisely to these details, since manifestly, the some moybe considerably varied Without do porting from. the spirit oi theinvention us deilned in the appended claims.

Roving thus described my invention, I claim as new and desire to secureby Letters Potent:

l. In apparatus for applying strip rnotei'lsl to the edge of wellboardor the like, moons for supportnie; eiroll oil strip ureter-lei, menusfor rendering one face oi sold strip udhesive, end menus for pressingsold strip upoinst sold edge, including o non-rotating slow memberhearing against sold edge, resilient menus to constontly urge sold shoeegoinst scold edge, and 2 rodshop-ed element of suhstontiul lengthslidnhly supporting sold shoe, the length oi soid rod-shapedclementpermittine" adjustment oi snid shoe to accommodate varying widthsoi moteriol to which the edge strip is applied.

2. In epperetus oi the close described, moons for exerting o resilientpressure, comprising a rodshoped member pivotelly mounted adjacent oneend, is pressing element slidobly carried by said member, and resilientmoons for mointeining pressure on so id pressing element in operution.

3. In opporetus of the clues described, moons for exerting e resilientpressure against the edge of an object, comprising a, rod shoped member,s. pressing element slidably carried by sold member, means on soldpressing element adopted to lie upon said object and define the relationof the pressing element to said edge, and resilient means formaintaining pressure of the pressing element against said edge.

4. Menus for pressing it strip or? materiel against the edge of o fist,moving object, comprising e port member, a smooth pressure edge, meansoverhanging sold edge and adopted to rest upon the object operoted uponto define the relation of said edge to the edge of the object, and onintegral guide formed sdjecent sold shoe edge for guiding strip materielto pass between said shoe edge and the edge of sold object.

6. In apparatus oi the clues described, moons for supplying stripmuteriol, and means for press" ins said strip against on object,comprising o. pressing element slidehly carried by n rod-shoped memberof substantial length, and resilient means for urging sold pressingelement against sold object, the length of sold rod-shaped element beingsuch as to permit operation upon material of varying dimensions byslidolole edjustment of sololpresslng element.

7. In apparatus of the class described, means for supporting a movingsheet of wallooord or the like, moons for supplying a strip of insteriolfor application to the edge sold sheet, end moons for pressing seidstrip oeoinst sold edge comprising e rod-shaped member mounted forvertical pivotal movement on sold supporting means, s pressing elementslldeolv curried by sold rod-shaped element, and moons for intoinineseid pressing, element in pressure relotlon to sold edge.

8. In opperotus oi the close described, means for supporting e movingsheet or? wsllhoerd'or the like, tees for supplying u strip oil materielfor application. to the edge ol sold sheet, means for pressing soldstripoeuinst sold edpe comprising s rod-shaped member mounted forverticol pivotal movement on sold iuipportine moons, o. pressing elementslideihly curried loy sold rodshaped element, moons tor intoinine soldpressing element in pressure relotion to sold. edge, end moons forlimiting the pivotol movement oi sold rod-shnped member.

9. In con-demotion with u lioord iormine inochlne, moons for epplvine;e. strip oi motel-lei to the edge of e moving ooerd sheet, sold moonscomprising o. piste member secured to the edge oi the board corner endextending slontinelv upwordly oncl inwordly of sold cerrier, means onsold plots for rototehiv receivingn. roll of sold strip materiel, endmeans for epplyine sold strip to sold hoard edge, the angle oi. soldpiste mornleer relotive to said board sheet being" such as to permitfree movement of sold sheet thereunder as well as to permit readyaccessibility for changine rolls or the lilre.

0RD 'E. runs.

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